AM-FM combined stereo receiver

Details AM-FM combined stereo receiver AM-FM combined stereo receiver

1991-02-06

1993-08-24

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Convertible to different type

455214, 381 15, H04B 116

Patent

active

052396991

ABSTRACT:
An improved AM-FM combined stereo receiver is provided having a single processor for removing, in the FM mode, arctangent distortion, and in the AM mode, to process the phase term from arctangent ##EQU1## to determine ##EQU2## Further, the radio includes a single discriminator circuit wherein, in the FM mode, the discriminator tank circuit is used to convert frequency deviation to baseband audio and, in the AM mode, the discriminator tank circuit is used as the frequency-determining element for the voltage controlled oscillator (VCO), the VCO being used to translate the intermediate frequency (IF) signal to baseband.

REFERENCES:
patent: 3665507 (1972-05-01), Peil
patent: 4172966 (1979-10-01), Parker et al.
patent: 4278839 (1981-07-01), Marik
patent: 4388496 (1983-06-01), Miyamoto
patent: 4408097 (1983-10-01), Bahnsen et al.
patent: 4426728 (1984-01-01), Kahn
patent: 4872207 (1989-10-01), Ecklund
patent: 5109542 (1992-04-01), Ecklund

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